Phloem Pressure Differences and 14C-Assimilate Translocation in Ecballium elaterium12
AUTOR(ES)
Sheikholeslam, Shahla N.
RESUMO
The role of phloem turgor pressure in 14C-assimilate translocation in Ecballium elaterium A. Rich was studied. The direction of translocation was manipulated by two methods: darkening, or defoliation, of the upper or lower halves of the shoots. After 24 hours of labeled assimilate movement, sieve tube turgor levels were measured with the phloem needle technique. Distribution of label, determined by autoradiography and counting, revealed a direct correlation between the direction of assimilate transport and the pressure difference. Phloem turgor levels always decreased in the stem of darkened shoots; this resulted in greater pressure differences in the stem between the source leaf receiving 14CO2 and treated regions.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=542406Documentos Relacionados
- Effect of Water Stress on Turgor Differences and 14C-Assimilate Movement in Phloem of Ecballium elaterium12
- Assimilate Unloading from Maize (Zea mays L.) Pedicel Tissues 1: II. Effects of Chemical Agents on Sugar, Amino Acid, and 14C-Assimilate Unloading
- An Analysis of Translocation in the Phloem of the Bean Plant Using Tho, P32, And C14. 12
- Translocation of C14 in Sugarcane 12
- A Mathematical Treatment of Munch's Pressure-Flow Hypothesis of Phloem Translocation 12